The science project (part 3)

After the complete success of the experiment Mrs Allison decided they have to remain in each other's body for a little while to test the mutual adaption . So while Mrs Allison took a walk Mat decided to make a bath. Only when he found himself alone he felt a bit of regret to participate to the project he was in the body of a chubby adult woman and he didn't know when he could go back in his athletic and young body.